Author
- Pietro Lamberti1
- Pius IV1
- Principio Fabricii1
- Privy Council of the United Kingdom1
- Prudentius1
- Qasem-e Anvar1
- Qāḍī Zāda al-Rūmī1
- Ranieri Farnese1
- Ranuccio Farnese1
- Regiomontanus1
- Republic of Venice1
- Ressani family1
- Richard Ward1
- Ro. Ba1
- Robert Cooke1
- Robert Fabyan1
- Roman Catholic Archdiocese of Siena1
- Safi al-Din al-Urmawi1
- Samuel Gallico1
- Sanai1